[matt4711]

Interestingly, there is a discussion in comments of this paper claiming the authors got it wrong.

But as you said, under the assumption that the test perfectly detects, the results are correct.

[leemailll]

This reminds me a recent interesting publication. A comment on Science (http://science.sciencemag.org/content/351/6277/1037.2.long) arguing a previous study on Science did the statistical analysis wrong is under critics that the comment itself did statistical analysis wrong.